* {{cite book | last=Spoto | first=Donald | title=The dark side of genius: the life of Alfred Hitchcock | publisher=Da Capo Press | publication-place=New York | date=1999 | isbn=0-306-80932-X}}
<ref name="h242">{{cite book | last=Spoto | first=Donald | title=The dark side of genius: the life of Alfred Hitchcock | publisher=Da Capo Press | publication-place=New York | date=1999 | isbn=0-306-80932-X | page=}}</ref>